ctlv3: fix typo in check command

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

etcdctl/ctlv3/command/check.go

@@ -269,7 +269,7 @@ func newCheckPerfCommand(cmd *cobra.Command, args []string) {
 func NewCheckDatascaleCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "datascale [options]",
-		Short: "Check the memory usage of holding data for diferent workloads on a given server endpoint.",
+		Short: "Check the memory usage of holding data for different workloads on a given server endpoint.",
 		Long:  "If no endpoint is provided, localhost will be used. If multiple endpoints are provided, first endpoint will be used.",
 		Run:   newCheckDatascaleCommand,
 	}